Sept.‘ 24, 1946. i v, E_ SPROUSE 2,408,347 WORM ADJUSTING DOUBLE WRAP HOSE CLAMP Filed July 19,1944 a5 _/ f AJ. /. ' 2 Sh‘eefcs-Sheet l ‘f4? Z, IN VEH TOR, Verngr E, JPr'qqJe) Sept, 24, 1946. I v - ' » ‘v. E. SPROUSE 2,408,347 WORM ADJUSTING DOUBLE WRAP HOSE ,CLAMR ' Filed July 19, 1944 l4- / 2 Shéets-Sheet 2 /7 /6 'BJ Mam,‘ Patented Sept. 24, 1946 4.: . ._ _ _ * 2,408,347 ‘UNITED STATES PATENT OFFICE" .WORM ADJUSTING DOUBLE WRAP . HOSE CLAMP ~~ Verner E. S‘prouse, Columbus, Ind. Application July ‘19, 1944, Serial No. 545,559 (01. 24_19) 4 Claims. 1 2 ing it into a smaller effective diameter. ‘ . ' the slot I3 outwardly and over the strap 9 with theothe'r end I8 of the band carried thereunder. This invention relates to a hose‘ clamp of a double wrap type with a worm screw for draw This wrapping and" general design of'the clamp ' strap with exception of its ends conforms to the disclosure of the strap in my Patent No. 2,363,206, for hose clamps. The end I8 is carried upover slots provided in the heretofore worm screw type the floor I9‘ of a bracket generally designated by clamp; to eliminate a fixed radius bearing mem the numeral 20, and inside of the bracket and ber on the» hose and to put the entire band parts then down through a slot 2| and turned around which touch the hose in tension; to eliminate any tongue part under compression; and to re 10 under the remaining portion of the ?oor I9 ex tending to the_ left, whereby the end I8 of the duce thetendency of backing oif of the worm band is bent through that slot 2I to form an screw under vibration particularly such as is en- 7 abutment therewith. That band end I8 may countered in aeronautical conditions. > ' The primary objects of the invention are to eliminate extrusion of hose rubber through the 7 I These and other objects and advantages of the ' I also be spot welded to the ?oor I9 if so desired 15 to secure the necessary attachment strength. invention‘ will become apparent to those ‘versed in the art in the following description of one particular formof thein'vention as illustrated in the accompanying drawings. in which I Fig. ,1 is a view- in side elevation in partial section of a structure‘embodying the invention; ‘Fig. 2, a view in tongue end elevation; a Fig. 3, a; top plan view in partial section; Fig. 4, a view in back elevation; and 1 f ‘ Fig. 5, a developed view of the band used to form the clamp.’ ' Like characters of reference indicate like parts throughoutthe several views in the drawings. .20 The ?oor‘ I9‘ of the bracket 29 rests on top of the outside of that part of the band which ap pears under the band end I8, both the floor I9 and the end I8 being free to travel circumferen tia-lly'.‘ The part" ‘I of the band 9 under the end [8 and'the bracket ?oor I9 is that part of’ the ‘band which'has a full width- and lies between the inner end of'the‘ tongue I0‘ and the beginning of the narrow portion I2‘ at the other end of the slot I3'r’emoved from the end of the slot I3 from which the tongue I0 emerges. The tongue I0 enters the-bracket 20 from the left side, Fig. 1, ' Referring ?rst to Fig. '5, a length of strap through an" opening adjacent the floor I9 and is metal 9 is formed to the shape as indicated wherein there is a tongue portion I 0 having a wrapped around,v s'lidingly thereover and over that part of the band; which is carried on the top side plurality of slots or abutments II therethrough of the floorl'il; this part 5 being the one which which will serve to receive the thread of the carries the slot ‘I6. ' The tongue extends‘ on worm screw as will later become’ moreapparent.‘ As indicated by‘the drawings, the tongue I9 is made to be the full width of the strap 9 but im mediately back of the tongue I0 there is a re through the bracket 20 through an opening 5 at its under right hand side above the floor I9 to extend freely over the other part of the band thereunder. duced width portion I2 which is provided to enter through the slot‘ I3 of a widened portion I4 at The floor I9 of the bracket 20 has upturned sides 22 and 23, Fig. 2,, between which the upper the other end ofthe blank or strap 9. part of the bracket 20 ?ts and is secured in any Where - the diameter of the clamp is'to' be rather'large, .40 suitable manner, such as’ by welding or brazing. such asabove two inches, itis ‘preferable to em ploy a tie I5 across the slot I3 in order to pre vent displacement of the narrow length I2 par A wornr'screw' 24 is carried by the‘ bracket 20 bybearing: portions 25 and 26 to have the thread Z‘Ifeng‘a‘g‘e with the slots‘ I I' of the tongue II). The ticularly in shipping, storage, and during'the ap slot" I6 appears immediately under these threads plication of the clamp to the hose. Then toward 45 2‘!v and‘ under the tongue In in order‘ to provide sufficient clearance for the threads as they may the end I8 of the blank 9 removed from the tongue end‘ is a short slot I5 which is provided extend through the thickness of the tongue III. The right hand end of the worm screw 24 is pro for worm screw thread clearance and which will be located in the formed clamp under the vided with a slotted head 28 whereby the screw slots II. 50 24 vmay be rotated by means of a screwdriver in The strap 9, as shown in Fig. 5, is wrapped order to advance the tongue I9 circumferentially around into circular form as indicated in the around through the housing 20 and thus reduce other views of the drawings to have the reduced the effective diameter of the clamp itself. width portion I2 rest'over the tie I5 within the Under some conditions, the hose clamp may slot I3 and have the tongue end In pass through 55 have to be located in such a position that the 2,408,847 3 4 . ‘screw head 28 is not positioned properly to be reached, and in order to provide for that con tingency, the bracket 28 is provided with a stub 2. A hose clamp comprising a hose wrapping band circumferentially wrapped to extend twice around the hose, the band having overlapping shaft 29 entering from the top side 4 through a ends; one of said ends being provided with a series of abutments therealong; a bracket to bearing 3 provided ‘by the bracket and having a which the other of said band ends is secured; said bracket having a member circumferentially riding on said band spaced between said ends; said one'end extending over said bracket mem ber; and a worm rotatably carried by‘the bracket and having a thread engaging said end abutments for pulling the entire band under tension be tween said ends to reduce its e?ective diameter; lower bearing 30 carried in a cross bracket 31 within the bracket 20‘. The shaft 29 carries a bevel gear 33 within the bracket 20 which is in constant mesh with a bevel gear 34 ?xed to the shaft or the worm screw 24 adjacent the bearing 25. The external end of the stub shaft 29 is provided with a head 35 herein shown as both slotted and hexagon in shape in order to said other band end extending over said bracket member under said one end to provide a sliding surface for circumferential travel therebetween, permit its being turned either by a wrench or by a screwdriver. 7 Since the end I8 is anchored to'the bracket 20, and the ?oor I 9 of the bracket 20 rests on top of a part of the hose clamp band and can not come into contact with the 'hose itself, the band itself may conform to all of the irregulari ties and differences in wallv thicknesses of the and down through an opening in said bracket member and along thereunder to ride against said band. 3. A hose clamp comprising a hose wrapping band circumferentially wrapped to extend twice around the hose, the band having overlapping ends; one of said ends being provided with a hose being clamped, and all of the band is placed under tension without any part thereof being un der compression, such as has heretofore been the case in many other designs of the prior art where series of abutments therealong; a bracket to a bearing plate is provided with a ?xed radius ' said'bracket having a member circumferentially which the other of said band ends is secured; to rest directly upon the hose._ Also since the riding on said band spaced between said ends; clamp wraps twice around the hose, it has twice the mechanical advantage with more pressure exerted on the hose under reduced torque in the said one end extending over said bracket mem 30 ' worm screw, all of which means that under vibra tion conditions, there is much less possibility of the worm screw 24 backing up to release pressure on the hose. ber; and a worm rotatably carried by the bracket and having a thread engaging said end abut ments for pulling the entire ‘band under tension between said ends to reduce its e?ective diam eter; and means carried by said bracket having ' an operating member angularly disposed from the I Thus, it is to be seen that the invention pro 32 wk axis of said worm thread for revolving the worm. 4. A hose clamp» comprising a hose wrapping vides a hose clamp wherein the encircling band band circumferentially wrapped to extend twice is entirely under tension without any portion thereof being under compression, and further, around the hose, the band having overlapping the band is so designed that even though the worm screw mechanism is employed, there are no ends; one or said ends being provided with a series of abutments therealong; a bracket to which the other of said band ends is secured; said bracket having a member circumferentially riding on said band spaced ‘between said ends; holes through which the hose may extrude to cause not only damage to the hosebut to re sist further takeup of the clamp. ‘ ’ While I have herein shown and described my invention in the one form as now best known L, to me, it is obvious that structural variations may be employed, particularly in they design of‘ the bracket 28, all without departing from the spirit of the invention, and VI,.therefore, do notdesire said one end extending over said bracket mem ber; and a worm rotatably carried by the bracket and having a thread engaging said vend abut ments for pulling the entire band under tension between said ends to reduce itse?ective diam eter; and means carried by said bracket hav described beyond the limitations as maybe im--' ing an operating'member angularly disposed from the axis ‘of said wormlthread for revolving the posed by the following claims. worm; said bracket carried means comprising a to be limited to that precise form as shown and I_ claim: ~ - a V ‘ v 1. A hose clamp comprising a hose wrapping band circumferentially wrapped to extend twice‘ around the hose, the band having overlapping ends; one of said ends being provided with a gear system interconnecting said worm and said operating member; the axis of‘said worm thread being substantially parallel to a tangent to said wrapped band; and said operating member ex tending externally‘ of said bracket and having its axis substantially normal to that of the worm thread; said gear system consisting of a gear ?xed to said worm, and a second gear meshed 60 with the ?rst gear and ?xed to said operating member," said operating member having a bear said one end extending over said bracket mem ing in an outer portion of said bracket outside ber; and a' worm rotatably carried by the bracket of'its attached gear; and a crossbar within said and having a thread _engaging said end abut bracket carrying an inner end of said operating ments for pulling the entire band under tension member. s between said ends to reduce its effective diam series of abutments therealong; a bracket to which the other of said band ends is secured; said brackethaving a member circumferentially riding on ‘said band spaced between said ends; eter. ‘ ' ‘ VERNER. E.‘ SPROUSE.